Submission #1079553

#	Time	Username	Problem	Language	Result	Execution time	Memory
1079553		Lalic	Rarest Insects (IOI22_insects)	C++17	47.50 / 100	178 ms	920 KiB

insects

#include "insects.h"
#include <bits/stdc++.h>
using namespace std;

#define fi first
#define se second
#define pb push_back
#define all(x) x.begin(), x.end()
#define allr(x) x.rbegin(), x.rend()
#define mp make_pair

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef complex<double> cd;

int min_cardinality(int N) {
	queue<int> q;
	vector<int> aux;
	
	int tipos=0;
	for(int i=0;i<N;i++){
		move_inside(i);
		int curr=press_button();
		
		if(curr>=2) move_outside(i);
		else{
			tipos++;
			q.push(i);
			aux.pb(i);
		}
	}
	
	if(tipos==1) return N;
	
	while(!q.empty()){
		move_outside(q.front());
		q.pop();
	}
	
	if(tipos<=(8*N)/2000){
		int ans=N;
		
		for(auto u : aux){
			int ret=1;
			move_inside(u);
			
			for(int i=0;i<N;i++){
				if(i==u) continue;
				
				move_inside(i);
				int at=press_button();
				
				if(at==2) ret++;
				
				move_outside(i);
			}
			
			move_outside(u);
			
			ans=min(ans, ret);
		}
		
		return ans;
	}
	
	int low=1, high=N-1, best=N;
	while(low<=high){
		int mid=(low+high)>>1;
		
		while(!q.empty()){
			move_outside(q.front());
			q.pop();
		}
		
		int qnt=0;
		for(int i=0;i<N;i++){
			move_inside(i);
			int curr=press_button();
			
			if(curr>mid) move_outside(i);
			else{
				qnt++;
				q.push(i);
			}
		}
		
		if(qnt/mid==tipos){
			best=mid;
			low=mid+1;
		}
		else high=mid-1;
	}
	
	return best;
}

• Subtask 1: 10 / 10
• Subtask 2: 15 / 15
• Subtask 3: 22.5 / 75